Linux init task

Modify rc.local

/etc/rc.local add command before exit 0
script must have execute authority x

update-rc.d command

sudo cp -f /home/pi/autowifi.sh /etc/init.d/
[ln -s /home/pi/autowifi.sh /etc/init.d/autowifi]
sudo chmod +x /etc/init.d/autowifi.sh
sudo chown root:root /etc/init.d/autowifi.sh
sudo update-rc.d autowifi.sh defaults 99
sudo update-rc.d -f autowifi.sh remove

1. add file or link to /etc/init.d
2. add execute authority to script
3. add user authority to script
4. command add script to init start
5. defaults [num] mean start sequence, the bigger the latter.

update-rc.d [-n] [-f] name remove
update-rc.d [-n] name default [NN | SS KK]

• -n do nothing, only preview.
• -f delete link, even script remain in /etc/init.d
• NN execute sequence
• SS begin sequence KK end sequence